Phase change energy storage liquid-cooled plate, battery pack active heat management system and control method

Abstract

The invention discloses a phase change energy storage liquid-cooled plate, a battery pack active heat management system and a control method. The battery pack active heat management system comprises battery modules, a temperature sensor, a phase change energy storage liquid-cooled plate, a thermal conductive glue, a battery management system, a throttle opening sensor, a brake opening sensor, a speed sensor, temperature sensor control harnesses, a power harness, other sensor harnesses, a control valve control harness, control valves, and a water pump; the battery modules and the phase change material energy storage liquid-cooled plate are connected through the thermal conductive glue by stickiness; the phase change energy storage liquid-cooled plate and the battery modules are connected tothe temperature sensor; the temperature sensor is connected to the battery management system through the control harnesses; the throttle opening sensor, the brake opening sensor and the speed sensorare connected to the battery management system through the control harnesses; and the battery management system controls the water pump and the control valves according to the information transmittedfrom the sensors to control the overall temperature rise of the battery pack, so as to increase the consistency of the battery pack. The invention has the characteristics of high flexibility, good heat dissipation effect and strong adaptability.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of rail transit battery modules, in particular to a phase-change energy storage liquid cold plate, an active thermal management system for a battery pack, and a control method. Background technique [0002] At present, urban rail transit vehicles at home and abroad all use electric power supply, and the power supply system is DC 750V and DC 1500V. Once a failure occurs, it will lead to the interruption of traction power supply, which will affect the quality of urban rail transit operation and cause operational losses. The rail car is equipped with an emergency traction battery module system. In the event of a vehicle failure, the train will switch to the emergency self-traction mode, relying on its own emergency traction battery module system to drive the train to the nearest station. As the battery module is the main source of emergency traction, it has high power and high voltage level...

AI Technical Summary

Problems solved by technology

By arranging a liquid cold plate under the battery module, the coolant flows through the liquid cold plate to take away the heat transferred from the battery to the liquid cold plate, thereby cooling the battery module. However, the current liquid cold plate has a fixed structure and can only Adjusting the flow rate cannot adjust the heat dissipation efficiency according to the real-time temperature distribution of the battery module. The heat dissipation mode is single, that is, it is impossible to locally strengthen heat dissipation in high-temperature areas, resulting in low heat dissipation efficiency, and it is impossible to control the high-temperature battery caused by changes in working conditions. In a suitable temperature range, the thermal balance of the battery module is poor at the same time, which limits the performance and service life of the battery

[0004] Patent Publication No. CN105742693A, the publication date is July 6, 2016. The name of the invention is a high-safety lithium-ion battery module. This application discloses a high-safety lithium-ion battery module. The disadvantages are: 1 . The liquid cooling device used in the high-safety lithium-ion battery module disclosed in this invention patent cannot adjust the heat dissipation efficiency according to the real-time temperature distribution of the battery module; 2. It takes a long time to cool the battery to a certain temperature value

[0005] Patent Publication No. CN201510584799.8, the publication date is December 23, 2015. The name of the invention is a battery water-cooled radiator. The application discloses a battery water-cooled radiator. The module conducts heat dissipation, but the structure of the liquid cooling plate is fixed, and the heat dissipation efficiency cannot be adjusted according to the real-time change of the battery module temperature, thereby reducing the thermal balance of the battery

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